Android动态加载so文件

void System.load(String pathName);

try { 
            String localPath = Environment.getExternalStorageDirectory() + path; 
            Log.v(TAG, "LazyBandingLib localPath:" + localPath); 

            String[] tokens = mPatterns.split(path); 
            if (null == tokens || tokens.length <= 0 
                    || tokens[tokens.length - 1] == "") { 
                Log.v(TAG, "非法的文件路径！"); 
                return -3; 
            } 
            // 开辟一个输入流 
            File inFile = new File(localPath); 
            // 判断需加载的文件是否存在 
            if (!inFile.exists()) { 
                // 下载远程驱动文件 
                Log.v(TAG, inFile.getAbsolutePath() + " is not fond!"); 
                return 1; 
            } 
            FileInputStream fis = new FileInputStream(inFile); 

            File dir = context.getDir("libs", Context.MODE_PRIVATE); 
            // 获取驱动文件输出流 
            File soFile = new File(dir, tokens[tokens.length - 1]); 
            if (!soFile.exists()) { 
                Log.v(TAG, "### " + soFile.getAbsolutePath() + " is not exists"); 
                FileOutputStream fos = new FileOutputStream(soFile); 
                Log.v(TAG, "FileOutputStream:" + fos.toString() + ",tokens:" 
                        + tokens[tokens.length - 1]); 

                // 字节数组输出流，写入到内存中(ram) 
                ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
                byte[] buffer = new byte[1024]; 
                int len = -1; 
                while ((len = fis.read(buffer)) != -1) { 
                    baos.write(buffer, 0, len); 
                } 
                // 从内存到写入到具体文件 
                fos.write(baos.toByteArray()); 
                // 关闭文件流 
                baos.close(); 
                fos.close(); 
            } 
            fis.close(); 
            Log.v(TAG, "### System.load start"); 
            // 加载外设驱动 
            System.load(soFile.getAbsolutePath()); 
            Log.v(TAG, "### System.load End"); 

            return 0; 

        } catch (Exception e) { 
            Log.v(TAG, "Exception   " + e.getMessage()); 
            e.printStackTrace(); 
            return -1; 

}